US Bridges

Mauna Loa Ave over Big Dalton Wash

Fair

Los Angeles County, California · 1.0MI E/O Grand Ave · Structure no. 53C1441

Built
1960
65 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
52 ft
1 main span
Daily traffic
2,329
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mauna Loa Ave over Big Dalton Wash is a concrete slab carrying Mauna Loa Ave over Big Dalton Wash in Los Angeles County, California. It was built in 1960, so it is 65 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,329 vehicles a day, roughly 2% of them trucks, projected to reach 3,222 by 2045. The structure is 52 ft (15.7 m) long and 52 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMauna Loa Ave
CrossesBig Dalton Wash
Location1.0MI E/O Grand Ave
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.12506, -117.85655
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.6 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length52 ft (15.7 m)
Longest span46 ft (14.1 m)
Deck width52 ft (15.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,329 (2017)
Projected traffic3,222 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mauna Loa Ave over Big Dalton Wash built?

It was built in 1960, making it 65 years old in 2025.

What condition is Mauna Loa Ave over Big Dalton Wash in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2025.

How much traffic does Mauna Loa Ave over Big Dalton Wash carry?

About 2,329 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Mauna Loa Ave over Big Dalton Wash?

The structure is 52 ft (15.7 m) long with a longest span of 46 ft (14.1 m) and a deck 52 ft wide.

Who owns Mauna Loa Ave over Big Dalton Wash?

It is owned by the City or Municipal Highway Agency.